In 2003, the U.S. Federal Trade Commission opened the National Do Not Call Registry, allowing people to opt out of telemarketing calls. With the new national registry and a plethora of state regulations, it was difficult for businesses to know which phone numbers they could or couldn't call, and violations were subject to stiff fines. DNC.com is a commercial web service that lets businesses upload customer contact information. The system automatically detects and "scrubs" telephone numbers in these lists against a variety of Do-Not-Call databases.

I created client and server-side code for the user interface of this website, including work on the customer signup, authentication, and billing systems. I also did a lot of backend work, including core development and extensions to the AOLserver platform, such as interfaces to POP3, MIME, and SMTP services.